Item specifics
Description
G5516 Light Sensor Module Product Overview
The G5516 Light Sensor Module is a light intensity detection module based on a photosensitive resistor, featuring a sensitive photoresistor sensor and an LM393 wide-voltage comparator. The module provides both digital output (DO) and analog output (AO) signal outputs, offering flexible integration with various microcontroller systems. An onboard adjustable potentiometer allows users to set the light detection threshold according to actual environmental requirements. With a wide operating voltage of DC 3.3V-5V, it is compatible with mainstream development platforms including UNO R3. The compact PCB measures only 3.2×1.4cm and features mounting holes for easy installation. It is widely used in light intensity detection, smart car light-seeking modules, and light-controlled switches.
G5516 Light Sensor Module Key Features
Sensitive Photoresistor Sensor: Features a G5516 photoresistor (GL5516 series) with bright resistance of 5kΩ~10kΩ (at 10Lux), dark resistance of 200kΩ~500kΩ, and peak spectral response at 540nm.
LM393 Wide-Voltage Comparator: Uses a wide-voltage LM393 comparator for clean signal output, good waveform, and strong drive capability (exceeding 15mA).
Dual Signal Output: Provides DO digital switch output (TTL level, High 3.3V / Low 0V) and AO analog voltage output (0~VCC analog voltage).
Adjustable Detection Threshold: Features an onboard potentiometer for adjusting the light detection threshold to suit different environments.
Wide Operating Voltage: Supports DC 3.3V-5V for compatibility with both 3.3V and 5V systems.
Standard 4-Pin Interface: VCC, GND, DO, AO with 2.54mm pitch for easy jumper wire connection.
Compact PCB Design: PCB dimensions of 3.2×1.4cm with mounting holes for secure installation.
Module Usage Instructions
The module is most sensitive to ambient light, typically used to detect surrounding light intensity for triggering microcontrollers or relay modules.
When ambient light intensity is below the set threshold, the DO output is High; when it exceeds the threshold, the DO output is Low.
The DO output can be directly connected to a microcontroller to detect light intensity changes via high/low level signals.
The DO output can directly drive a relay module to create a light-controlled switch.
The AO analog output can be connected to an AD module for more precise ambient light intensity measurement via ADC conversion.
G5516 Light Sensor Module Applications
The G5516 Light Sensor Module is widely used in light intensity detection and ambient light sensing applications. It is ideal for smart car light-seeking modules for automatic light tracking or avoidance. Suitable for light-controlled switch systems for automatic streetlight or corridor lighting control. Applicable to smart home light-sensing automation (automatic curtains, dimmable lighting). Suitable for agricultural light monitoring and greenhouse environmental light control. Ideal for Arduino, Raspberry Pi and other open-source hardware sensor expansion and educational experiments. Also suitable for various light alarm and light data acquisition electronic projects.
G5516 Light Sensor Module Key Advantages
Dual Signal Output for Flexible Adaptation: Provides both DO digital and AO analog outputs for simple threshold triggering or precise light intensity data acquisition, adapting to projects of varying complexity.
Adjustable Detection Threshold: Onboard potentiometer allows users to freely adjust the trigger threshold to suit actual ambient light conditions without code modification or component replacement.
Wide Voltage Compatibility: Supports DC 3.3V-5V for direct compatibility with 3.3V systems (Raspberry Pi, ESP32) and 5V systems (Arduino UNO R3) without level shifting.
LM393 Comparator with Strong Drive: Features an LM393 wide-voltage comparator for clean, stable output with drive capability exceeding 15mA, capable of directly driving relay modules.
Sensitive Photoresistor: Uses G5516/GL5516 photoresistor with significant resistance variation between light and dark (dark resistance 200kΩ~500kΩ, bright resistance 5kΩ~10kΩ) for sensitive light response.
Compact and Easy to Install: PCB measures only 3.2×1.4cm with mounting holes for easy integration into various devices.
Standard Plug-and-Play Interface: 4-pin 2.54mm pitch interface with jumper wires for direct connection to various development boards without soldering.
Arduino Ecosystem Compatible: Fully compatible with UNO R3 and other Arduino series boards with abundant examples and community support.
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FAQ
1. What is the G5516 Light Sensor Module?
It is a sensor module that uses a photoresistor (LDR) to detect ambient light intensity. By sensing light changes, it outputs either an analog voltage or a digital switching signal, commonly used in projects like smart lighting and light-seeking robots.
2. What are its key specifications?
Operating Voltage: DC 3.3V ~ 5V
Main IC: LM393 voltage comparator
Photoresistor Model: 5516
Outputs: AO (Analog Output) and DO (Digital Output)
PCB Size: Approx. 32mm × 14mm
Mounting: Includes fixing bolt holes
3. What package does it use?
The module itself is a small PCB, with interfaces via 4-pin headers (2.54mm pitch). The core components are a photoresistor (usually through-hole) and the LM393 comparator IC.
4. What applications is this module suitable for?
Light intensity detection and light-seeking for smart cars
Light-controlled switches: e.g., automatic lighting, streetlight control
Connecting to microcontrollers (e.g., Arduino, STM32) for ambient light monitoring
Pairing with an ADC module for precise light intensity values
5. What is the difference between the AO and DO outputs?
AO (Analog Output): Outputs an analog voltage proportional to light intensity. Connect to a microcontroller's ADC pin to read precise light values.
DO (Digital Output): Uses the LM393 comparator to output a digital 0 or 1 signal. When light intensity exceeds the set threshold, DO outputs LOW (0); below the threshold, it outputs HIGH (1).
6. What development tools or platforms does this module use?
No specific tools are required. It is a universal electronic module that can be directly connected to various microcontroller boards (like UNO R3, Raspberry Pi, STM32, etc.) via its 4-pin header.
7. What is the operating temperature range of the G5516 module?
The photoresistor on the module typically operates within -30℃ to +70℃. The actual operating temperature of the module may be limited by other components, but it generally suits standard room temperature environments.
8. What is its operating voltage and the DO HIGH level?
The module operates on DC 3.3V ~ 5V. The DO HIGH level voltage is close to the module's supply voltage (VCC). With 5V power, DO HIGH is approx. 5V; with 3.3V power, it's approx. 3.3V. This level can directly connect to 3.3V or 5V microcontroller I/O pins.
9. How to adjust the trigger threshold of the light sensor?
The board has a blue potentiometer. By rotating it, you adjust the reference voltage of the LM393 comparator, thus changing the light intensity threshold at which the DO digital output flips.
10. What are the design considerations when using the G5516 module?
The photoresistor's resistance is around 8 to 20KΩ in bright light and around 1MΩ in the dark. Output values will change rapidly with ambient light fluctuations.
The module is very sensitive to ambient light; avoid covering the sensing surface during installation.
Do not turn the potentiometer fully clockwise or counterclockwise; keep it near the middle position and then fine-tune it.